Question

Which of these is related to Proof resilience
A. PE stored in an elastic body
B. stiffness of a beam
C. elastic fatigue
D. elastic relaxation

Answer 1

Hint: Proof Resilience is the maximum amount of energy that any elastic body can store up to its elastic limit without getting distorted forever or permanently.

Complete step-by-step answer:
Resilience is defined as energy absorbed or stored by the elastic body within its elastic limit whereas Proof resilience refers to the maximum capacity to which resilience can happen. It is limited to the resilience phenomena for the elastic body. Proof resilience can be graphically calculated as total potential energy stored. It is equal to the area under the graph between load and deformation produced under elastic limit.

Additional Information: Options B, C, and D are incorrect because of following reasons:
1.For option B: Stiffness of beam is related to bending and deflection moments. Therefore, this phenomenon is not directly related to Proof Resilience.
2.For option C: Elastic fatigue refers to the state when elastic properties of the body are lost. Hence, it's not related to Proof resilience.
3.For option D: Elastic relaxation deals with deformation when the plastic limit is reached and material is no longer to restore itself. Hence, it is not related to Proof resilience.

Correct Answer:
A. PE stored in an elastic body

Note: There is a difference between Resilience and Proof resilience. Proof resilience is the limiting stage of resilience of an elastic body. Resilience of the body is the reason for the phenomenon restoration from original shape when applied force is removed from the elastic body within elastic limits.